Presenting and stripping means for presses.



E. KAIZIVNGER. PRESENTING AND STRIPPING MEANS FOR PRESSES.

APPLICATION FILED MAY I3, 1915- 1,186,103. Patented June 6,1916.

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Mull-Immun E. `KATZINGER. PRESENTING AND STRIPING MEANS FOR PRESSES. APPLlcATloN man MAY13 .1915.

1,1 86,103. 1 Patented June 6, 1916.

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UNITED sTATEs PATENT oEEicE.

EDWARD KA'IZINGER, OF CHICAGO, ILLINOIS, ASSIGNOR TO EDWARD KATZINGER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

IPRESENTING AND STRIPPING- MEANS FOR PRESS-ES.

Specication of Letters Patent.

Patented June 6, 1916.

Application filed May 13, 1915. Serial No. 27,752.

To all 'whom z't may concern.

Be it known that I, EDWARD KATZINGER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Presenting and Stripping Means for Presses, of which the following is a specification.

My invention relates to improvements 1n metal-forming presses, and has for its ob ject the provision of simple and eflicient mechanism for presenting partially formed articles or blanks to the dies of metal-forming presses and for stripping such articles from said dies after being acted on by the latter.

Other objects will appear hereinafter.

The invention consists substantially in the combinations and arrangements of parts hereinafter described, shown in the accompanying drawings forming a part of this specification, and more particularly set forth in the subjoined claims.

In the drawings,-Figure 1 is a front elevation of a metal-forming press embodying my invention; Fig. 2 is an enlarged vertical section of a dash pot usedin the construction; Fig. 3 is an enlarged bottom view of one of the presenting and stripping fingers used in the construction; Fig. 4 is a side elevation of a press embodying my invention; Fig. 5 is a section taken on line 5-5 in Fig. 3, and Fig. 6 is an enlarged fragmental View of a cam movement used in the construction.

My invention is capable of embodiment in a great variety of metal-cutting and forming presses, as will be apparent from the following description.

For convenience, I have illustrated my invention embodied in a metal-forming press for forming baking pans and the like.

Referring more particularly to the drawings, a base or frame 10 of a metal-forming press is provided with a metal-forming die member or mandrel l1, secured rigidly thereto in any approved manner. In the frame 10 I provide guideways 12in which are mounted die holders 13. The two die holders 13 are adaptedV to move longitudinally of the frame 10 and coperate with the mandrel 11 in forming the pans or other articles. In the frame is journaled a main shaft 14, and connecting the shaft 14 with the die carriers 13 is a driving connection 15. The details of this driving connection are not described, since they form 'no part of this invention. Secured to the upper portion of the frame 10 is an upright arm 16 or a goose-neck, in which is slidably mounted a rod 17. The rod 17 is provided with an enlargement or stop 18. On another portion of the rod 17 above stop 18 is a nut 19 threaded on the rod, and immediately above the nut 19 is a second nut 20, forming' a lock nut for the nut 19, thereby preventing retrograde movement of the nut 19. Between the nut 19 and stop 18 is slidably mounted a head 21, which is recessed at its sides 22 for the reception of the bifurcated end 23 of a lever 24. Said lever is pivoted to the arm 16 as at 25. Between the lower end of the head 21 and the stop 18 is a compression spring 26, normally maintaining the head 21 against nut 19. At the upper c'nd of rod 17 is a piston head 27 reciprocally mounted in a cylinder 28 and the latter is provided with vent openings 29 and 30. The cylinder 28 and piston 27 form a dash pot, and are adapted to cause a restraining movement on the rod 17 upon the latter being reciprocated.

The shaft l4'carries cams 31 and 31 secured thereto by a key 32, or its equivalent. On the frame 10 is an arm 33, to'which is pivoted a bell crank 34 and the latter is provided with two rollers 35 and 35 at its ends adapted to ride on the surfaces of the cams 31 and 31. The cams 31 and 31 are so cut that each of the rollers will always be in contact with its respective cam surface. One end of the bell crank 34 is connected, by means of a connecting rod 36, with the lever 24 so that upon. rotation of shaft 14 the rod 17 will be caused to reciprocate.

Oli the lower end of rod 17 is a die member 37 adapted to coperate with the die member 11 in the formation of the articles in the press. upon rotation of shaft 14, the die member 37 will descend and hold a pan A or other article, shown in Figs. 1 and 4, tightly on the die member 11 during the operation of the dies 38 carried on the die holders 13. The dash pot serves to retard the movement of rod 17 and die member 37, in order to minimize the impact of the die member 37 with an article on die member 11. It will be seen that upon the end 23 of lever 24 movingV downwardly against spring 26 and the inioo luence of the piston of the dash pot, the die member 37 will be caused to be retarded with respect to the movement ot' end 23 and head 2l, thereby preventing injury to the article to be formed. As soon as the air in the lower end of cylinder 28 passes through opening 29, the piston 27 will be permitted to descend, thereby allowing spring 2G to force the die member 37 into firm engagement with an article upon die member 1]..

I provide suitable fingers for guiding the pan A or other article into position on the die member ll. The form I prefer embodies linger members 39, which are secured to the die member 37 by cap screws 40 or their equivalent. 'Ihe lo-wer end of each of the lingers 39 is recessed as at 4l (Fig, 5), and a member 42 slidably mounted thereon and adapted to move laterally of the die member 11.. The members 42 are provided with slots 43, through which pass screws 44 which hold the members 42 in position in recesses 41. Threaded in the members 42 are screws 45, which pass through suitable openings in lingers 39, as clearly shown in Fig. 5, to limit the movement of the members 42 toward die member 11. On the screws 45 are mounted compression springs 46, which normally maintain the members 42 at their ter minals of movement nearest the die member Il. The arrangement of the linger members and parts carried thereby is such that the adjacent edges of members 42 will always engage the upper incline surfaces 47 of die member l1 upon the downward movement ot die member 37. As die member 37 moves downwardly, the members 42 yield and compress the springs 46, so that the members 42 are always in engagement with the die member 11 during the portion of their movement by said die member. lVith this arrangement, a pan or other article placed on the members 42 will be carried -down wardly into correct position on die member l1, and upon upward movement of die member 37 the members 42 will strip the pan or other article from the die member ll., so that the operator may easily remove such article from the press. In order to insure placing the article in position on members 42, a stop 4S is secured to arm 16 and is adjustable by means of screws 49 for different sized articles. All the parts are so arranged that they may be adjusted for different sized articles, as will be readily understood upon reference to the drawings.

In the opening 29 is i'itted'an air cock 29 for regulating the passage et air from the cylinder 28 as the piston 27 is descending. This provides means for varying the retarding eiiect on the die member 38. rIhe opening 29 is preferably spaced slightly above the lower head of the cylinder 28, so that air will be imprisoned in the lower end of the set forth, but desire to avail myself of suchy variations and changes as come within the scope of the appended claims.

I claim:

l. In combination, a frame; a reciprocatory rod in said frame; a die member carried by the rod; a head slidably mounted' on the rod; a yieldable connection between the head and rod; means imparting motion to the head; and means connected with the rod adapted to retard the movement of the latter with respect to the head.

In combination, a frame; a rod reciprocally mounted in the frame; stops on the rod; a head on the rod between the stops; a spring normally pressing the head against one of the stops; a die member carried at one end of the rod; a dash pot at the other end of the rod, and means imparting motion to the head.

3. In combination, a frame; a die member in the frame; a reciprocatory rod mounted in the frame; a die member on said rod and adapted to coperate with said first-mentioned die member; a stop on said rod; a head slidably mounted on the rod; a spring normally holding the head against the stop; means imparting motion to the head; and a dash pot connected with the rod adapted to retard the movement of the rod with respect to the head and reduce the impact of the die members.

4. In combination, a frame; a stationary die mounted in the frame; a movable die mounted in the frame and adapted to approach the stationary die; and :fingers on the movable die extending in the direction of travel of the latter and adapted to pass on opposite sides of the stationary die, there being portions of the lingers adapted to carry work onto the stationary die and to separate said work from the stationary die after having been operated upon by the dies.

5. In combination, a frame; a stationary die mounted in the frame; a movable die mounted in the frame and adapted to approach the stationary die; fingers on the movable die extending in the direction of the latter; and spring-pressed members on the free ends of the fingers extending toward each other and adapted to engage the under edges of work and separate the latter from the stationary die after such work has been operated upon by the dies.

6. In combination, a frame; a stationary die mounted in the frame; a movable die mounted inthe frame and adapted to approach the stationary die; fingers on the movable die and eXtending in the direction of travel of the latter, there being recesses in the free ends of said fingers; slotted stripping members in said recesses; screws passing through said slots and threaded in the fingers forming guides for said members; and springs engaging the remote edges of said members pressing the latter toward each other.

7. In combination, a frame; a stationary die mounted in the frame; a movable die in the frame and having slots therein; fingers extending downwardly from the movable die and toward the stationary die; screws passing through said slots and threaded in the fingers adjustably securing the latter to the movable die; and spring-pressed stripping members mounted on the free ends of the fingers adapted to engage the under edges of work after the latter has been operated upon by the dies and stripped such work from the stationary die.

In testimony whereof I have signed my name to this speciication, in the presence of two subscribing witnesses, on this 11th day of May, A. D. 1915.

EDWARD KATZINGER.

Witnesses:

THOMAS CoLsON, CHARLEs H. SEEM.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C. 

